Refer to Irregularities of TPMS/LTPWS Sensor sealing surface later in this bulletin.

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Aftermarket accessory wheels may also have the sensor stem in the incorrect orientation (Figure 1). This may cause the sensor to not transmit "data" when the wheel starts to rotate or may prevent the transmitted data from reaching the TPMS/LTPWS antenna.

The TPMS/LTPWS sensors can be damaged if the sensors are at the 6 O'clock position (closest to the ground) when the tires are deflated.

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When filling the tires with nitrogen, the vehicle should either be raised off the ground on a lift, or the wheels individually removed from the vehicle to prevent damaging the TPMS/LTPWS wheel sensors.

IMPORTANT :

The vehicle should be raised or individual wheels removed to prevent the rims from contacting the ground when deflated.

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Improper use of tire inflator tools can break the stem of a Tire Pressure Monitor System (TPMS) sensor.

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The type of stem breakage shown in Figure 2 is not considered a warrantable repair.

Please refer to the following examples of recommended and not recommended tire pressure filling tools.

Not Recommended tire inflator tools.

Recommended tire inflating tools.

Moving TPMS/LTPWS wheel assemblies from one vehicle to another and TPMS/LTPWS sensor registration

Moving TPMS/LTPWS wheel assemblies

TPMS/LTPWS sensors can have different part numbers from model to model and may not operate correctly or operate at all.

CAUTION :

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New style and old style TPMS components are not compatible and cannot be interchanged.

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Swapping of new style and old style components will cause the TPMS to stop operating correctly.

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If further confirmation of the TPMS sensor part number is required, review the part number of the originally installed equipment before replacement.

To confirm the latest part numbers, always consult the appropriate parts catalog when replacing or exchanging TPMS sensors, receivers, or control modules.

TPMS/LTPWS sensors must be registered to each vehicle every time the wheels are swapped

TPMS/LTPWS wheel sensors must be registered each time the wheels are rotated, swapped or replaced so that the sensors operate correctly and send the correct tire pressure from the new wheel location.

If tires are rotated or service is required on a vehicle's Tire Pressure Monitor System/Low Tire Pressure Warning System (TPMS/LTPWS), the Signal Tech II (special tool J-50190), Tire Pressure Sensor Activation Tool J-45295, or Transmitter Activation tool (J-45295-A) can be used to register TPMS/LTPWS sensors.

NOTE :

Failure to update Signal Tech II may lead to misdiagnosis of vehicles built after February 28, 2010.

Radio Frequency (RF) interference can cause a No Data condition and may be caused by any device that is transmitting RF on the same or similar frequency that the TPMS/LTPWS sensors are on and is not covered under warranty.

Smart cell phone chargers (Figure 8), aftermarket DVD's players, etc. should be removed from the vehicle first and then the vehicle retested before further diagnostic is performed.

Sensor leaks

Sensor leaks can be caused by irregularities of the wheel TPMS/LTPWS sensor sealing surface, corrosion caused by aftermarket tire sealers and damaged TPMS/LTPWS sensor seals. Seals are available individually.

Aftermarket Tire Sealers

Aftermarket tire sealants and/or aerosol repair kits should not be used (refer to the vehicle's Owner's Manual).

The tire pressure should be compensated an additional +3 psi and adjusted to 38 psi to avoid dropping below the label value when the tires cool.

Natural tire pressure loss over time:

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Vehicle tire pressure can naturally decrease by approximately 1.0 - 1.5 psi per month. This will vary due to seasonal temperature change.

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After 6 to 8 months tire pressure may be low enough to turn ON the Low Tire Pressure Warning Light.

High Altitude

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At high altitude locations, a standard tire pressure gauge may show the tire pressure higher than the TPMS system. If the gauge reading is not accounted for, this could result in turning ON the Low Tire Pressure Warning Light.